Navigate

The kinetic energy needed to project a body of mass m from the surface of earth

The kinetic energy needed to project a body of mass m from the surface of earth (radius R) to infinity is

Options

(a) mgR/2
(b) 2mgR
(c) mgR
(d) mgR/4

Correct Answer:

mgR

Explanation:

The kinetic energy =1/2MVe²
The escape velocity Ve=√2gR
Ve²=2gR
= 2mgR/2
=mgR

AIEEE2002
admin:

Related Questions

  1. Element ²³⁴U has 92 protons and 234 nucleons in its nucleus. It decays by
  2. If force(F), Velocity(V) and time(T) are taken as fundamental units, then the dimensions
  3. Consider a compound slab consisting of two different materials having equal thickness
  4. Radioactivity of a sample at T₁ time is R₁ and at time T₂ is R₂. If half-life
  5. If force(F),velocity(v) and time(T) are taken as units, then the dimensions of mass are